Home / 15,721.29-21,700.71-9,756.45

Finding the Fourth Proportional to 15,721.29, 21,700.71 and 9,756.45

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Solution

The fourth proportional to 15,721.29, 21,700.71 and 9,756.45 is: 13,467.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,721.29 : 21,700.71 = 9,756.45 : x
  2. Step 2: Convert to fraction form
    15,721.29/21,700.71 = 9,756.45/x
  3. Step 3: Cross multiply
    15,721.29x = 21,700.71 × 9,756.45
  4. Step 4: Simplify right side
    15,721.29x = 211,721,892.08
  5. Step 5: Solve for x
    x = 211,721,892.08/15,721.29
  6. Step 6: Final answer
    x = 13,467.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.